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2014-08-27T16:45:51+07:00
S = Vo.t + 1/2 a t^2
900 = 0 + 1/2. 2. t^2
900 = t^2
maka t = 30
1 5 1
2014-08-27T16:46:32+07:00
S = Vo.t + 1/2 . a. t^2
900 = 0 + 1/2 . 2. t^2
900 = t^2
t^2 = (30)^2
t = 30 sekon